Its high-quality 6½-inch polypropylene-cone woofer pumps out the deep notes all the way down to 45 Hz, with low distortion and a clean midrange. The ¾-inch soft-dome tweeter has a smooth sound you wouldn't expect in this price range.

With a sensitivity of 90 dB, the W667 needs only about half as much power as a typical speaker. That's especially important in budget multi-room installations, which sometimes use very low-powered amplifiers. Because the W667 uses the same cutting template as our other 6½-inch in-wall speakers, you can easily mix and match Proficient models without worrying about cutting the wrong-size hole.